docs: def objects_delete(self, bucket, key):
      """Deletes the specified object.
  
      Args:
        bucket: the name of the bucket.
        key: the key of the object within the bucket.
      Raises:
        Exception if there is an error performing the operation.
      """
      url = Api._ENDPOINT + (Api._OBJECT_PATH % (bucket, Api._escape_key(key)))
      datalab.utils.Http.request(url, method='DELETE', credentials=self._credentials,
                                 raw_response=True)